Calendar

This presentation provides an overview of extended joint slabs primarily used on industrial warehouse floors. An overview of the stresses that must be controlled in order to extend joints will be discussed.  Two case studies of extended joints will be presented; one of which is in the Twin Cities metro area. There is no cost to attend this webinar.

The presenter will be Christopher Tull, PE (CRT Concrete Consulting, LLC)

Concrete Mix Designs: Expectations vs. Reality – What We Want vs. What We Get

Today’s concrete mixes are very complex, containing a cocktail of admixtures and different cementitious materials. These are very different than those mixes of a few decades ago. Additionally, there has been a significant increase in the expected performance of concrete, not only in terms of strength, but especially in terms of other characteristics, such as those related to durability and service life.

However, concrete specifications have not progressed as much. The industry still specifies concrete mostly in terms of strength, slump, and sometimes some other requirements that supposedly relate to durability, such as shrinkage and rapid chloride penetration, hoping to achieve the desired performance. This presentation will give an overview of how or if the current specified properties and testing requirements can really represent or guarantee the desired performance.

The presenter will be Jussara Tanesi, PhD., FAC (American Engineering Testing)

A Concrete Flatwork Associate (formerly Concrete Flatwork Technician) is a person who has demonstrated knowledge (via a written examination) on proper procedures to place, consolidate, finish, edge, joint, cure and protect concrete flatwork.

Certification Requirements:  ACI will grant certification to those candidates who obtain a passing grade on the written examination.  The two-hour written examination is closed-book and consists of approximately 50 multiple-choice questions. The passing grade for the written examination is 70%.

Recertification is necessary every five years and requires successful completion of a written examination OR 10 hours documented continuing education from an approved source. Individuals with Concrete Flatwork Associate certification can upgrade to Advanced Finisher status upon submittal and approval of sufficient work experience or combination of sufficient work experience and passing the ACI performance examination. Certification at the Advanced Finisher level is valid for the remainder of the original Associate certification period.

An Advanced Concrete Flatwork Finisher (formerly Concrete Flatwork Finisher and Technician) is a craftsman who has demonstrated the knowledge AND skills and/or experience necessary to place, consolidate, finish, edge, joint, cure and protect concrete flatwork.

Certification Requirements:  ACI will grant certification to those candidates who obtain a passing grade on the written examination PLUS either:

Possess 4,500 hours of actual on-the-job finishing* experience (approximately three years of regular full-time work) OR possess 1,500 hours of actual on-the-job finishing* experience (approximately one year of regular full-time work) AND successfully complete the performance examination**.

**MCC will NOT be offering a performance examination at this class, so anyone seeking Advanced Concrete Flatwork Finisher Certification at this class MUST possess 4,500 hours of actual on-the-job finishing experience.

Concrete provides structures with strength, rigidity, and resilience from deformation. These characteristics, however, result in concrete structures lacking the flexibility to move in response to environmental or volume changes. Cracking is usually the first sign of distress in concrete. Cracking of concrete flatwork is natural, expected, and accepted. However, cracks may affect appearance, performance, and maintenance costs. This presentation will discuss the various types of concrete cracks and how to best minimize their occurrence.  The presenter will be Kim Basham PhD, PE, FACI (KB Engineering LLC)

This webinar was developed cooperatively by concrete-related associations from Minnesota, North Dakota, South Dakota and Wisconsin.  The goal of the cooperative effort is to bring a greater awareness of cast-in-place concrete to the design and construction communities via quality continuing education programs.